Add preset polish and broadcast metadata (fw 0.8.0).

Ship station reorder, DAB playing ids in presets, RDS PS/RT and DAB DLS in tuner status, Si4684 data-service read, host tests, and UI now-playing lines.

Co-authored-by: Cursor <cursoragent@cursor.com>

Software/components/services/station/include/station/StationService.hpp

@@ -102,6 +102,21 @@ public:
     [[nodiscard]] std::expected<void, core::StationListError> removeAt(
         std::size_t index);
 
+    /**
+     * @brief    reorder — move a preset within the list and persist.
+     *
+     * @dname    reorder
+     * @param    fromIndex  Current list position.
+     * @param    toIndex    Target list position.
+     * @return   Ok on success, or StationListError.
+     * @pubstate mutates list_ and NVS on success.
+     *
+     * @author   Michele Bigi
+     * @date     2026-07-06
+     */
+    [[nodiscard]] std::expected<void, core::StationListError> reorder(
+        std::size_t fromIndex, std::size_t toIndex);
+
     /**
      * @brief    tuneToIndex — recall a saved preset on the tuner.
      *

Software/components/services/station/src/StationService.cpp

@@ -62,8 +62,8 @@ std::expected<void, core::StationListError> StationService::add(
         return added;
     }
     if (auto saved = persist(); !saved) {
-        list_.removeAt(list_.stations().size() - 1U);
-        return std::unexpected(core::StationListError::Full);
+        (void)list_.removeAt(list_.stations().size() - 1U);
+        return std::unexpected(core::StationListError::PersistFailed);
     }
     return {};
 }
@@ -75,6 +75,22 @@ std::expected<void, core::StationListError> StationService::removeAt(
         return removed;
     }
     if (auto saved = persist(); !saved) {
+        return std::unexpected(core::StationListError::PersistFailed);
+    }
+    return {};
+}
+
+std::expected<void, core::StationListError> StationService::reorder(
+    std::size_t fromIndex,
+    std::size_t toIndex)
+{
+    if (auto moved = list_.move(fromIndex, toIndex); !moved) {
+        return moved;
+    }
+    if (auto saved = persist(); !saved) {
+        if (list_.move(toIndex, fromIndex)) {
+            return std::unexpected(core::StationListError::PersistFailed);
+        }
         return std::unexpected(core::StationListError::NotFound);
     }
     return {};

Software/components/services/tuner/include/tuner/TunerService.hpp

@@ -20,6 +20,7 @@
 
 #include <cstdint>
 #include <expected>
+#include <optional>
 #include <vector>
 
 namespace tuner {
@@ -72,7 +73,7 @@ public:
      * @dname    tuneDab
      * @param    freqIndex  Ensemble index 0–37.
      * @return   Ok on success, or a TunerError from ITuner.
-     * @pubstate writes lastDabIndex_ on success.
+     * @pubstate writes lastDabIndex_ on success; clears last-played DAB ids.
      *
      * @author   Michele Bigi
      * @date     2026-07-06
@@ -129,7 +130,7 @@ public:
      * @param    serviceId    Selected service identifier.
      * @param    componentId  Audio component within the service.
      * @return   Ok on success, or a TunerError from ITuner.
-     * @pubstate delegates to tuner_.
+     * @pubstate delegates to tuner_; caches service/component for status JSON.
      *
      * @author   Michele Bigi
      * @date     2026-07-06
@@ -168,6 +169,8 @@ private:
     std::uint8_t lastDabIndex_;
     core::FrequencyKHz lastFmFrequency_;
     std::uint8_t volume_;
+    std::optional<std::uint32_t> lastPlayedServiceId_;
+    std::optional<std::uint32_t> lastPlayedComponentId_;
 };
 
 } // namespace tuner

Software/components/services/tuner/src/TunerService.cpp

@@ -37,6 +37,10 @@ std::expected<core::TunerStatus, core::TunerError> TunerService::refreshStatus()
     auto status = tuner_.readStatus();
     if (status) {
         volume_ = status->volume;
+        if (status->band == core::TunerBand::Dab) {
+            status->dabPlayingServiceId = lastPlayedServiceId_;
+            status->dabPlayingComponentId = lastPlayedComponentId_;
+        }
     }
     return status;
 }
@@ -48,6 +52,8 @@ std::expected<void, core::TunerError> TunerService::tuneDab(
         return result;
     }
     lastDabIndex_ = freqIndex;
+    lastPlayedServiceId_.reset();
+    lastPlayedComponentId_.reset();
     return {};
 }
 
@@ -81,7 +87,12 @@ std::expected<void, core::TunerError> TunerService::playDabService(
     std::uint32_t serviceId,
     std::uint32_t componentId)
 {
-    return tuner_.playDabService(serviceId, componentId);
+    if (auto result = tuner_.playDabService(serviceId, componentId); !result) {
+        return result;
+    }
+    lastPlayedServiceId_ = serviceId;
+    lastPlayedComponentId_ = componentId;
+    return {};
 }
 
 std::expected<void, core::TunerError> TunerService::setVolume(std::uint8_t level)